SPListItem task = taskList.Items.GetItemById(int.Parse(args[i]));
    task["Status"] = "Завершена";
    task["CustomEditor"] = userId;
    SPWorkflowTask.AlterTask(task, new Hashtable(), false);

POST /_vti_bin/copy.asmx HTTP/1.1
Host: razrab
Content-Type: text/xml; charset=utf-8
Content-Length: length
SOAPAction: "http://schemas.microsoft.com/sharepoint/soap/CopyIntoItems"

<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
  <soap:Body>
    <CopyIntoItems xmlns="http://schemas.microsoft.com/sharepoint/soap/">
      <SourceUrl>string</SourceUrl>
      <DestinationUrls>
        <string>string</string>
        <string>string</string>
      </DestinationUrls>
      <Fields>
        <FieldInformation Type="Invalid or Integer or Text or Note or DateTime or Counter or Choice or Lookup or Boolean or Number or Currency or URL or Computed or Threading or Guid or MultiChoice or GridChoice or Calculated or File or Attachments or User or Recurrence or CrossProjectLink or ModStat or AllDayEvent or Error" DisplayName="string" InternalName="string" Id="guid" Value="string" />
        <FieldInformation Type="Invalid or Integer or Text or Note or DateTime or Counter or Choice or Lookup or Boolean or Number or Currency or URL or Computed or Threading or Guid or MultiChoice or GridChoice or Calculated or File or Attachments or User or Recurrence or CrossProjectLink or ModStat or AllDayEvent or Error" DisplayName="string" InternalName="string" Id="guid" Value="string" />
      </Fields>
      <Stream>base64Binary</Stream>
    </CopyIntoItems>
  </soap:Body>
</soap:Envelope>

...
<CopyIntoItems xmlns="http://schemas.microsoft.com/sharepoint/soap/"><SourceUrl>C:\2.txt</SourceUrl>
<DestinationUrls><string>http://wss/doclib/2.txt</string></DestinationUrls><Fields><FieldInformation Type="Lookup" DisplayName="test" InternalName="test" Id="{3ebe9a57-1291-4c53-babe-ef9e0bfb8f9b}" Value="3;#Вариант3"/></Fields>
...

ldifde -f portal_SPN.txt -t 3268 -d "" -l servicePrincipalName -r "(servicePrincipalName=HTTP/portal*)" -p subtree